Problems easily existing in complete cabinet:
The design of the main incoming line is unreasonable, unsightly and unsafe. The upper and lower space left for the incoming switch is too limited. There is no spacer between the incoming and outgoing lines of the air switch, and there is a large stress between the cable and the terminal. It is recommended to use the copper bar structure for incoming line, and the air switch is equipped with a door handle for operation.
The layout is not very reasonable, the strong current surrounds the weak current, the grounding measures are poor, and the interference is difficult to solve.
Lack of complete set of electrical cabinet
Problems in the complete set of electrical cabinet shown in the figure above:
For the same problem, the wiring is a little messy.
I feel that the overall wire diameter is too small, especially the grounding wire diameter.
The air switch of the main incoming line has no auxiliary contact input to the Cu, nor does the Cu control the main contactor to control the main power supply of the drive.
The shielding layer of motor line and encoder line is not repeatedly grounded.
A good cabinet is designed, with specifications and design. It should be clearly and correctly implemented on the drawings before the complete set processing party can make it. The design engineer should not complain that the complete set processing party below has not done well, but first examine whether he has designed the drawings well.
The design engineer shall do a good job in communicating with the complete set processing party, especially the new drawings. It is best to visit the site for the first layout and installation to see whether the actual layout is consistent with the design, listen to the suggestions of the on-site workers and avoid making cars behind closed doors. Sometimes the drawings look very pleasant, but the layout is unreasonable, and even cause the difficulty of processing and wiring, At this time, the suggestions of experienced workers and masters are of great reference value. We should listen to the suggestions in time and make modifications as soon as possible. Remember not to let go in order to save trouble, nor do we insist on doing things without repentance.
It is necessary to form a set of complete processing technology and specifications suitable for yourself, form a good habit of complete processing and construction according to the drawings, and distinguish the authority and responsibility. If the drawings are wrong, the design engineer is responsible, and the complete processing party who does not make the complete processing according to the drawings is responsible.
The factory acceptance system shall be strictly followed, and the acceptance shall be carried out in strict accordance with the drawing. If it is inconsistent with the drawing, it shall be reworked.
Summarize the experience and lessons of design and complete set processing every time, and leave summary minutes for reference and improvement of similar design next time.
Even in the process of processing complete sets, if possible, the design engineer should go to the workshop more often, care about the complete sets of electrical cabinets being processed designed by himself, and communicate more with the complete sets processing party on site:
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